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. Author manuscript; available in PMC: 2018 Apr 4.
Published in final edited form as: Ann Emerg Med. 2017 Jul 21;71(1):54–63.e2. doi: 10.1016/j.annemergmed.2017.06.022

Figure 2.

Figure 2

An interrupted time series demonstrating the percentage of adult trauma patients receiving a head CT scan before (January 2014 to May 14, 2015) and after (May 15, 2015 to December 2015) implementation of the Canadian CT Head Rule. A, The percentage of CTs performed. B, The predicted results, adjusting for patient, physician, and facility characteristics.